U = safe uniform load (psf)
C = safe concentrated load (psf)
D = deflection in inches
E = modulus of elasticity, 29,000,000 (psi)
F = fiber stress, 18,000 (psi)

Material: ASTM-A-1011 standard

Deflection: Spans and loads to the right of the bold line exceed 1/4″ deflection for uniform load of 100 psf which provides safe pedestrian comport. These can be exceeded for other types of loads with engineer’s approval.

Serrated Bars: For serrated grating, the depth of grating required for a specified load is 1/4″deeper than that shown in the table.

LOAD & DEFLECTION TABLE:
Loads and deflections are theoretical and based on static loading.
Bar SizeSymbol# per sfSec. Mod per ft. of width
SAFE SPAN (Direction of Bearing Bar)
2′-02′-63′-03′-64′-04′-65′-0
3/4″ x 1/8″ Non-Serrated Only11W46.20.21U
D		614
0.099		393
0.155		273
0.223		200
0.304		153
0.397		121
0.503		98
0.621
11P4
11P2		6.6
7.6		C
D		614
0.079		491
0.124		409
0.179		351
0.243		307
0.318		273
0.402		245
0.497
3/4″ x 3/16″ Non-Serrated Only11W49.10.31U
D		920
0.099		589
0.155		409
0.223		301
0.304		230
0.397		182
0.503		147
0.621
11P4
11P2		9.9
11.3		C
D		920
0.079		736
0.124		614
0.179		526
0.243		460
0.318		409
0.402		368
0.497
5′-66′-06′-6
1″ x 1/8″11W4
11W2		8.1
8.6		0.36U
D		1091
0.074		698
0.116		485
0.168		356
0.228		273
0.298		215
0.377		175
0.466		144
0.563		121
0.670
11P4
11P2		8.5
9.4		C
D		1091
0.060		873
0.093		727
0.134		623
0.182		545
0.238		485
0.302		436
0.372		397
0.451		364
0.536
1″ x 3/16″11W4
11W2		11.9
12.5		0.55U
D		1636
0.074		1047
0.116		727
0.168		534
0.228		409
0.298		323
0.377		262
0.466		216
0.563		182
0.670		155
0.787
11P4
11P2		12.7
14.2		C
D		1636
0.060		1309
0.093		1091
0.134		935
0.182		818
0.238		727
0.302		655
0.372		595
0.451		545
0.536		503
0.629
6′-67′-08′-09′-0
1-1/4″ x 1/8″11W4
11W2		10.0 10.50.57U
D		1705
0.060		1091
0.093		758
0.134		557
0.182		426
0.238		337
0.302		273
0.372		225
0.451		189
0.536		161
0.629		139
0.730
11P4
11P2		10.7
12.0		C
D		1705
0.048		1364
0.074		1136
0.107		974
0.146		852
0.191		758
0.241		682
0.298		620
0.360		568
0.429		524
0.504		487
0.584
1-1/4″ x 3/16″11W4
11W2		14.7
15.3		0.85U
D		2557
0.060		1636
0.093		1136
0.134		835
0.182		639
0.238		505
0.302		409
0.372		338
0.451		284
0.536		242
0.629		209
0.730		160
0.953
11P4
11P2		16.0
17.9		C
D		2557
0.048		2545
0.074		1705
0.107		1461
0.146		1278
0.191		1136
0.241		1023
0.298		930
0.360		852
0.429		787
0.504		731
0.584		639
0.763
1-1/2″ x 1/8″11W4
11W2		11.9 12.40.82U
D		2455
0.050		1571
0.078		1091
0.112		801
0.152		614
0.199		485
0.251		393
0.310		325
0.376		273
0.447		232
0.524		200
0.608		153
0.794		121
1.006
11P4
11P2		12.6
13.9		C
D		2455
0.040		1964
0.062		1636
0.089		1403
0.122		1227
0.159		1091
0.201		982
0.248		893
0.300		818
0.358		755
0.420		701
0.487		614
0.636		545
0.804
1-1/2″ x 3/16″11W4
11W2		17.5
18.1		1.23U
D		3682
0.050		2356
0.078		1636
0.112		1202
0.152		920
0.199		727
0.251		589
0.310		487
0.376		409
0.447		349
0.524		301
0.608		230
0.794		182
1.006
11P4
11P2		18.8
20.7		C
D		3682
0.040		2945
0.062		2455
0.089		2104
0.122		1841
0.159		1636
0.201		1473
0.248		1339
0.300		1227
0.358		1133
0.420		1052
0.487		920
0.636		818
0.804
1-3/4″ x 3/16″11W4
11W2		20.4
21.0		1.67U
D		5011
0.043		3207
0.067		2227
0.096		1636
0.130		1253
0.170		990
0.215		802
0.266		663
0.322		557
0.383		474
0.450		409
0.521		313
0.681		247
0.862
11P4
11P2		21.7
23.6		C
D		5011
0.034		4009
0.053		3341
0.077		2864
0.104		2506
0.136		2227
0.172		2005
0.213		822
0.257		1670
0.306		1542
0.360		1432
0.417		1253
0.545		1114
0.689
2″ x 3/16″11W4
11W2		23.2
23.8		2.18U
D		6545
0.037		4189
0.058		2909
0.084		2137
0.114		1636
0.149		1293
0.189		1047
0.233		866
0.282		727
0.335		620
0.393		534
0.456		409
0.596		323
0.754
11P4
11P2		24.5
26.4		C
D		6545
0.030		5236
0.047		4364
0.067		3740
0.091		3273
0.119		2909
0.151		2618
0.186		2380
0.225		2182
0.268		2014
0.315		1870
0.365		1636
0.477		1455
0.603
2-1/4″ x 3/16″11W4
11W2		26.0
26.6		2.76U
D		8284
0.033		5302
0.052		3682
0.074		2705
0.101		2071
0.132		1636
0.168		1325
0.207		1095
0.250		920
0.298		784
0.350		676
0.406		518
0.530		409
0.670
11P4
11P2		27.3
29.2		C
D		8284
0.026		6627
0.041		5523
0.060		4734
0.081		4142
0.106		3682
0.134		3314
0.166		3012
0.200		2761
0.238		2549
0.280		2367
0.324		2071
0.424		1841
0.536
2-1/2″ x 3/16″11W4
11W2		28.8
29.4		3.41U
D		10227
0.030		6545
0.047		4545
0.067		3340
0.091		2557
0.119		2020
0.151		1636
0.186		1352
0.225		1136
0.268		968
0.315		835
0.365		639
0.477		505
0.603
11P4
11P2		30.1
32.0		C
D		10227
0.024		8182
0.037		6818
0.054		5844
0.073		5114
0.095		4545
0.121		4091
0.149		3719
0.180		3409
0.215		3147
0.252		2922
0.292		2557
0.381		2273
0.483
11W4 & 11P4 STANDARD PANEL WIDTH (inches)

Note: P-Press-Locked cross bars typically extend 1/8″ each side. W-Welded cross rods may extend 1/8″ each side.
Panel widths do not include these extensions.

No. of Bars2345678910111213141516
1/8″ Bar13/16″1-1/2″2-3/16″2-7/8″3-9/16″4-1/4″4-15/16″5-5/8″6-5/16″7″7-11/16″8-3/8″9-1/16″9-3/4″10-7/16″
3/16″ Bar7/8″1-9/16″2-1/4″2-15/16″3-5/8″4-5/16″5″5-11/16″6-3/8″7-1/16″7-3/4″8-7/16″9-1/8″9-13/16″10-1/2″
No. of Bars171819202122232425262728293031
1/8″ Bar11-1/8″11-13/16″12-1/2″13-3/16″13-7/8″14-9/16″15-1/4″15-5/16″16-5/8″17-5/16″18″18-11/16″19-3/8″20-1/16″20-3/4″
3/16″ Bar11-3/16″11-7/8″12-9/16″13-1/4″13-15/16″14-7/8″15-5/16″16″16-11/16″17-3/8″18-1/16″18-3/4″19-7/16″20-1/8″20-13/16″
No. of Bars323334353637383940414243444546
1/8″ Bar21-7/16″22-1/8″22-13/16″23-1/2″24-3/16″24-7/8″25-9/16″26-1/4″26-15/16″27-5/8″28-5/16″29″29-11/16″30-3/8″31-1/16″
3/16″ Bar21-1/2″22-3/16″22-7/8″23-9/16″24-1/4″24-15/16″25-5/8″26-5/16″27″27-11/16″28-3/8″29-1/16″29-3/4″30-7/16″31-1/8″
No. of Bars47484950515253
1/8″ Bar31-3/4″32-7/16″33-1/8″33-13/16″34-1/2″35-3/16″35-7/8″
3/16″ Bar31-13/16″32-1/2″33-3/16″33-7/8″34-9/16″35-1/4″35-15/16″